Interval locator gauge



FIG. 1 is a top and front perspective view of an interval locator gauge showing my new design;

FIG. 2 is a top plan view, the bottom plan view being a mirror image thereof;

FIG. 3 is a front edge view, the rear edge being substantially plain;

FIG. 4 is a right side elevational view, the left side being a mirror image; and

FIG. 5 is a perspective view thereof on a reduced scale; the broken lines being environmental only and form no part of the claimed design. 

The ornamental design for an interval locator gauge, as shown and described. 